Automatic oiling device



April 7, 1942. c. LANGBEIN ET AL OIL LEVEL AUTOMATIC OILING DEVICE Filed July 16. 1941 THE/R ATTORNEY Patented Apr. 7, 1942 STAT if. S i

r e r HQE.

AUTOMATIC CEILING DEVICE Application. July. 16, 194-1, Serial: No. 402,686

'7 Claims.

Our invention relates to drilling machines and more particularly to a drill block to take the place of the one generally used to hold the work during the drilling operation.

It. is usual on all drill presses to have a block of Wood or soft iron on the table, on which the work is placed to be drilled, and it is also usual to have a can of lubricating oil near by with a swab therein for use on the drill while in operation. Each time the drill is to operate on the work, the operator has to swab the drill with the lubricant one or more times according to the thickness and the hardness of the material; thisswabbing of the drill consumes time and ourtails production.

The prime object of the invention is to provide a drill block that will contain the drill lubricant all the time. Before starting the drill the reser' voir will be filled with the desired, lubricant and placed in position on the table of the press, and

as the operator proceeds with his job, the drill will pass through the work into the work block and into the oil contained therein, and as the drill uses the oil from the block the reservoir will supply the same only in quantities as used.

Another object of the invention is to provide a means whereby the operator is free at all times to attend to his work. The drill as has been noted, on each operation after passing through the work becomes immersed in the oil within the drill block, thus it is already lubricated with sufiicient oil and is ready for the next operation, thereby dismissing the attention of the operator to the drill except only as to the work. It is now the custom to have a swab ready to give the drill a new supply of oil for the neXt operation.

Another object of our invention is to provide a neat, simple and cheap article of manufacture, one that is portable and one that requires only casual attention once in a while, say for instance, once a week for cleaning out the chips from the block l0, and furnishing a fresh supply of oil to the reservoir 20. It must be convenient to handle and must be self lubricating, with no levers, valves or other devices to get out of order, and one that requires no adjustments or parts requiring alignment, and is ready at all times for any drill operation of the press without having to provide the drill with the swab on every operation. The device is self feeding and self regulating and the block is a single unit that remains on the press table, so that there is no danger of an overflow of the oil to flood the table or press.

It is well known that devices have been designed to'take care of the automatic oiling of the drill during drilling operations, but these contain means for continuously oiling the drill and have means for catching the overflow of oil that is usual with such devices. In the use of the drill block shown, it is not necessary to use any special drill, as the drill itself when extricated from the block carries with it sufiicient oil to complete the nextdrilling operation.

Further aims, objects and advantages of the invention will appear from a consideration of the description which follows inconnection with the accompanying drawing showing a purely illustrative purpose embodiment of the invention. It is understood that the description is brief only because of the fact that the device is small and simple to make but when the assembled into a complete operating unit is very'efiicient and time saving; the scope of the invention will be defined in the appended claims.

The drawing shows a vertical sectional view through the reservoir and the drill block. As will be noted, the drill block 10 is a hollow casting of cast iron having at its lower end an opening that is covered with a screw cover II for the purpose of removing the chips that accumulate therein during certain intervals. The oil and the chips therein will not interfere in any way with the proper lubricating of the drill during the drilling operation.

The top of the drill block 10 has an inclined part terminating in a reduced head l2, the here within the same is sufficient to receive and house a hardened bushing l3 that is ground to fit said bore snugly, these bushings each have bores 14 it being usual to provide only one for each unit unless it has been constructed for a particular purpose. Again, the device will operate with a small drill as with a larger one. The drill I5 after passing through the work, as has been noted, passes down through the bore [4 in the bushing and when released from the work, has received a supply of oil for the next operation.

To the side of the drill block ID is a suitable projection or boss I6 to receive a pipe I! that is attached to the reservoir [8. This reservoir is a commercial article that is manufactured and sold on the market for the lubrication of the various parts of machines, and is so well known that it is not thought necessary to require any lengthy description. Suifice to say that the base [9 is adapted to receive and hold an oil supply cup 20, said cup being held secure to the base by an inverted stirrup 2|, on the upper part of which it is provided with locking means 22 for holding the cup securely to the base. On the lower face of the base, is a'downward projection 23 provided with two extending pipes 24 and 25, one of which is shorter than the other, so that as the drill uses the oil in the drill block Hi, the same is replenished from the reservoir or cup 20.

On the side of the projection 23, there is provided a short air channel (not shown) that communicates with the outside of the base, and at the same time communicates with the interior of the sheath 26 that surrounds the two pipes 24 and 25. As the oil is fed to the block ID from the reservoir, and as soon as it gets below the level of the line (marked oil level) the air permits the oil to flow down the pipe 25 and thus replenish the supply to the block. By this arrangement the oil is always ready to be fed forward to the block as the same may berequired; at no time under no circumstances does the oil in the block become higher than the line indicated, thus neither the work, nor the work table of the drill press is ever flooded with oil.

The device is applicable on any drill press where the parts are comparatively small, or where the parts are such that they can be placed on the drill block l0, it being only necessary for the bushing l3 to have the desired bore to receive the drill to be used. It is usual in production work to provide a drill press for one class of work and to transfer the said work along the line should the same require drills of diiferent sizes. But with our device, one or more different diameters could be used on the one block according to the character of the work that may be desired, it being only necessary to elongate the block and provide. bushings for the same to co-operate with the various drills to be used.

Again, it may be necessary to provide wings or projections on the drill block so as to secure the same to the drill press table; where small parts only are, to be operated upon, it is not thought necessary as the weight of the drill block together with the reservoir and its contents will be sufficient to retain it in the same position.

What we claim as new and desire Letters Patent for is:

1. An automatic lubricator for drilling machines, comprising a hollow drill block having a removable closure at its lower end, a bushing on its upper end to support the work, in combination with an oil reservoir adapted to furnish oil to the block in quantities as may be required.

2. An automatic lubricator for drilling machines, having in combination a hollow block, a bushing therein to support the work and having a suitable bore for the drill, of a removable bottom for said block, and an oil receptacle connected to said drill block with means for feeding the oil from the receptacle in quantities as may be required.

3. An automatic lubricator for drilling machines, the combination of a hollow drill block having a tapered upper end, a work supporting means on said upper end having a bore therein, of a removable means on the bottom of the block, of a receptacle connected to said block with means for feeding oil from the reservoir in quantities only as may be required.

4. The combination of a hollow drill block having a tapered upper part terminating in a reduced head, of a bushing located in said head,

a removable bottom for said block, and a reservoir connected thereto with means for furnishing oil to the block in quantities only as may be used.

5. In combination, a drill block having a work supporting top apertured to permit free passage of a drill therethrough, and a lubricant holding chamber in the block beneath and in communication with the top aperture.

6. In combination, a drill block having a work supporting top apertured to permit free passage of a drill therethrough, a lubricant holding chamber in the block beneath and communicating with the top aperture, and a detachable drain closure in a wall of said chamber.

7. In combination, a drill block having a work supporting top apertured to permit free passage of a drill therethrough, a chamber in the block beneath and in communication with the top aperture, a constant level liquid lubricant supply means connected to said block in communication with said chamber, and a removable drain closure in the bottom of said chamber.

CHARLES LAN GBEIN. CHARLES G. GORDON. 

